What if Kaeya never got his vision?

Diluc’s dad and Kaeya’s adoptive father died on Diluc’s 18th birthday from protecting Diluc. Kaeya ended up Telling Diluc about him being a spy from KHANRI’AH Diluc was furious and ended up attacking Kaeya with his claymore. Kaeya could hard,y defend himself since he didn’t even have a vision yet and could only use his sword which was no match compared to Diluc’s claymore.. Diluc ended up killing Kaeya in the end. The claymore went through Kaeya’s stomach and the claymore ended up getting stuck causing him to pass away.. too this day Diluc couldn’t even look in the mirror without feeling intense guilt and anger at himself.